1980576381636 has 72 divisors (see below), whose sum is σ = 5128513213824. Its totient is φ = 644130527040.

The previous prime is 1980576381523. The next prime is 1980576381709. The reversal of 1980576381636 is 6361836750891.

1980576381636 is a `hidden beast` number, since 19 + 8 + 0 + 576 + 3 + 8 + 16 + 36 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 708010 + ... + 2112446.

It is an arithmetic number, because the mean of its divisors is an integer number (71229350192).

Almost surely, 2^{1980576381636} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1980576381636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2564256606912).

1980576381636 is an abundant number, since it is smaller than the sum of its proper divisors (3147936832188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1980576381636 is a wasteful number, since it uses less digits than its factorization.

1980576381636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405401 (or 1405396 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 1980576381636 in words is "one trillion, nine hundred eighty billion, five hundred seventy-six million, three hundred eighty-one thousand, six hundred thirty-six".